Articles | Volume 2-oae2023
https://doi.org/10.5194/sp-2-oae2023-6-2023
https://doi.org/10.5194/sp-2-oae2023-6-2023
27 Nov 2023
 | OAE Guide 2023 | Chapter 6
 | 27 Nov 2023 | OAE Guide 2023 | Chapter 6

Mesocosm experiments in ocean alkalinity enhancement research

Ulf Riebesell, Daniela Basso, Sonja Geilert, Andrew W. Dale, and Matthias Kreuzburg

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Cited articles

Bach, L. T., Gill, S. J., Rickaby, R. E. M., Gore, S., and Renforth, P.: CO2 Removal With Enhanced Weathering and Ocean Alkalinity Enhancement: Potential Risks and Co-benefits for Marine Pelagic Ecosystems, Front. Clim., 1, 7, https://doi.org/10.3389/fclim.2019.00007, 2019. 
Eisaman, M. D., Geilert, S., Renforth, P., Bastianini, L., Campbell, J., Dale, A. W., Foteinis, S., Grasse, P., Hawrot, O., Löscher, C. R., Rau, G. H., and Rønning, J.: Assessing the technical aspects of ocean-alkalinity-enhancement approaches, in: Guide to Best Practices in Ocean Alkalinity Enhancement Research, edited by: Oschlies, A., Stevenson, A., Bach, L. T., Fennel, K., Rickaby, R. E. M., Satterfield, T., Webb, R., and Gattuso, J.-P., Copernicus Publications, State Planet, 2-oae2023, 3, https://doi.org/10.5194/sp-2-oae2023-3-2023, 2023. 
Flipkens, G., Blust, R., and Town, R. M.: Deriving Nickel (Ni(II)) and Chromium (Cr(III)) based environmentally safe olivine guidelines for coastal enhanced silicate weathering, Environ. Sci. Technol., 55, 12362–12371, https://doi.org/10.1021/acs.est.1c02974, 2021. 
Foteinis, S., Campbell, J. S., Renforth, P.: Life cycle assessment of coastal enhanced weathering for carbon dioxide removal from air, Environ. Sci. Technol., 57, 6169-6178, https://doi.org/10.1021/acs.est.2c08633, 2023. 
Fuhr, M., Geilert, S., Schmidt, M., Liebetrau, V., Vogt, C., Ledwig, B., and Wallmann, K.: Kinetics of olivine weathering in seawater: An experimental study, Front. Clim., 4, 1–20, https://doi.org/10.3389/fclim.2022.831587, 2022. 
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Short summary
Mesocosm experiments represent a highly valuable tool in determining the safe operating space of ocean alkalinity enhancement (OAE) applications. By combining realism and biological complexity with controllability and replication, they provide an ideal OAE test bed and a critical stepping stone towards field applications. Mesocosm approaches can also be helpful in testing the efficacy, efficiency and permanence of OAE applications.
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